I noticed that in the hotkeys you can assign previous track and next track hotkeys to the mouse side buttons but they are locked to a specific mouse button. You can't make button 1 do next track and button 2 do previous track. It would be nice to be able to swap these around since the button 1 on my mouse is easier to reach and therefore would make more since to map it to next track since that is the command I would be using most often. It would also be nice If I could map them to perform any command such as the forward and backwards navigation buttons (the buttons in the top left corner underneath the MusicBee menu).